Advertisements
Advertisements
प्रश्न
When does a force do work?
Advertisements
उत्तर
A force does work whenever there is a displacement in the direction of force applied.
संबंधित प्रश्न
State and define the S.I. unit of work.
What do you mean by equilibrium of a body?
A body is provided at a point. A force of 20 N is applied at a distance of 40 cm from the pivot. Find the moment of force about the pivot.
What is the work done when the force on the object and the displacement of the object are perpendicular to each other?
In which one of the following cases is the work done more? When the angle between the direction of motion and that of the force is (i) 90° (ii) 0°.
A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep well, while his father does it in 2 minutes.
How much work each does? Take density of water = 103 kg m-3 and g = 9.8 N kg-1.
What do you understand by work? Is work a scalar or a vector quantity?
In the following case write yes, if the work is being done and no if no work is being done.
A man moving on the rough ground.
State the condition when the work done by the force is negative.
State the S.I. and C.G.S. units of energy. How are they related?
